Oil light - now you see it, now you don't
Super Moderator
Joined: Jan 2011
Posts: 16,322
Likes: 88
From: Savannah Georgia
1/2 X 20 thread for the switch, 1/8 npt usually for the test gauge. If possible, take switch with you to store, or test with theirs in the store. This way, you have already found out what a PITA it can be to get at in some cases with oil cooler lines and big hands. There was also an O ring behind the switch, go ahead and replace.
First, go rent a oil pressure tester from a local parts store, may need to buy an adapter so you can screw it in in-place of your oil pressure sender. Then on a cold start, test the pressure at idle and 2000 RPM's again when hot at idle and 2000 RPM's and get back to us with the 4 sets of numbers.
As for the weight of oil causing this, won't happen during the cold months so take your oil/weight and brand out of the picture for now.
Let us know what you find.
As for the weight of oil causing this, won't happen during the cold months so take your oil/weight and brand out of the picture for now.
Let us know what you find.
Drifting
Joined: Feb 2019
Posts: 39
Likes: 3
From: Arkansas
on D1 the actual oil pressure sensor is prone to going bad I remember changing it every 6-8 months on my d1 lucky they are cheap
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